• A. ${10}^{-10}m$
• B. ${10}^{-6}m$
• C. ${10}^{-9}m$
• D. ${10}^{-8}m$

Answer: Option A

Explanation:

• A. $O_2$
• B. $N_2$
• C. $C{O}_2$
• D. সবগুলো একই

Answer: Option B

Explanation:

• A. 5.76
• B. 3.76
• C. 4.76
• D. 2.76

Answer: Option A

Explanation:

• A. উভধর্মী
• B. নিরপেক্ষ
• C. অম্লীয়
• D. ক্ষারীয়

Answer: Option C

Explanation:

• A. 1280
• B. 160
• C. 320
• D. 960

Answer: Option A

Explanation:

• A. ${}_2{}^4\mathrm{He}$
• B. ${}_{-1}{}^{0}e$
• C. ${}_{+1}{}^{0}e$
• D. ${}_0{}^{1}n$

Answer: Option B

Explanation:

• A. 0.32
• B. -0.32
• C. 1.2
• D. -1.2

Answer: Option A

Explanation:

• A. $increase in \left[Z{n}^{2+}\right]$
• B. $increase in \left[C{u}^{2+}\right]$
• C. $increase in \left[Z{n}^{2+}\right] and \left[C{u}^{2+}\right] equally$
• D. $increase in \left[Z{n}^{2+}\right] and decrease in \left[C{u}^{2+}\right]$

Answer: Option B

Explanation:

• A. -1.08
• B. -0.04
• C. +1.08
• D. +0.04

Answer: Option C

Explanation:

• A. $Co/C{o}^{2+}\left(E°=+0.28 V\right)$
• B. $Mg/M{g}^{2+}\left(E°=+2.36 V\right)$
• C. $Ca/C{a}^{2+}\left(E°=+2.87 V\right)$
• D. $AI/A{I}^{3+}\left(E°=+1.66 V\right)$

Answer: Option A

Explanation:

• A. $\left[Z{n}^{2+}\right]=1.0 M$
• B. $\left(Z{n}^{2+}\right]=1.1 M$
• C. $\left[F{e}^{3+}\right]=1.1 M$
• D. $\left(F{e}^{2+}\right]=1.1 M$

Answer: Option C

Explanation:

• A. $Zn\to Z{n}^2+2e$
• B. $C{u}^{2+}+2e\to Cu$
• C. $Z{n}^{2+}+2e\to Zn$
• D. $Cu\to C{u}^{2+}+2e$

Answer: Option B

Explanation:

• A. $\frac{d\left|A\right|}{dt}=4\frac{d\left|C\right|}{dt}$
• B. $-\frac{d\left|A\right|}{dt}=4\frac{d\left|C\right|}{dt}$
• C. $-\frac{1}{2}\frac{d\left|A\right|}{dt}=\frac{1}{4}\frac{d\left|C\right|}{dt}$
• D. $-\frac{1}{2}\frac{d\left|A\right|}{dt}=4\frac{d\left|C\right|}{dt}$

Answer: Option C

Explanation:

• A. $SiC{l}_4$
• B. $PC{l}_3$
• C. $PC{I}_5$
• D. $S{F}_6$

Answer: Option C

Explanation:

• A. $C{H}_4$
• B. $C_2{H}_4$
• C. $C_2{H}_6$
• D. $C_2{H}_2$

Answer: Option B

Explanation: